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President Trump gets to work Jan 20, 2017 12:00 AM A A White House Chief of Staff Reince Priebus, right, watches as White House Staff Secretary Rob Porter, center, hands President Donald Trump a confirmation order for James Mattis as defense secretary, Friday, Jan. 20, 2017, in the Oval Office of the White House in Washington. (AP Photo/Evan Vucci) President Donald Trump signs a confirmation for Defense Secretary James Mattis, Friday, Jan. 20, 2017, in the Oval Office of the White House in Washington. (AP Photo/Evan Vucci)